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==== Release History ====

**1.2.0 **2007-04-20

   - Opencpn was built with the following objectives in mind.
  - Intended use as primary navigation interface for vessels with full-time helm-visible navigational suites.
  - Other tools may be better for offline route planning, tide and current prediction, online logging, etc.
  - Quick startup and shutdown.
  - Those and only those toolbar buttons really needed for daily operation.
  - Portability, thus wxWidgets core components. Currently tested and in production use on W98, XP, and Linux.
  - Conventional ( i.e. popular and modern ) chart format support. In the real world, this means BSB format raster
  - charts, and S57ENC format vector charts.

**1.2.2 **2008-01-02

  - Improved AIS symbology and diagnostics, including RateOfTurn indication.
  - Improved toolbar icon symbology, supporting day/dusk/dark color schemes.
  - Rationalized home directory selection for Windows, allowing program installation in arbitrary directory/folder.
  - Improved accuaracy of Great Circle distance/bearing calculations.
  - Optional Depth Units displayable on chart as embossed character image.
  - Ownship position indicator on thumbnail charts accurately follow true GPS position.

**1.2.4 **2008-04-20

  - Configure/build modifications for Unicode systems, especially Ubuntu.
  - Added Route and Mark property sheets.
  - Improved S57 ENC symbology.

**1.2.6**  2008-08-31 This is a maintenance and feature update release,

  - containing some S57 ENC symbology improvements,
  - greater compliance with IHO S52 standards,
  - and various enhancements and bug fixes.
  - Especially interesting are the DUSK and NIGHT display modes, for which user feedback is highly desired…

**1.2.8**  2008-12-25 Mac OS X Support, including installable application bundle (OpenCPN.dmg),

  - GNU/gcc compatible system build files, and XCode project files.
  - Garmin USB GPS device support for Windows platforms.
  - Miscellaneous bug fixes and user optimizations.

**1.3.0**  2009-05-09

  - CM93 worldwide vector chart support, with automatic chart scaling.
  - Improved AIS target tracking with configurable CPA/collision warning options.
  - GPX compatible waypoint and route exporting tools.
  - Configurable range rings centered on ownship position.
  - And, as usual, miscellaneous bug fixes and user optimizations.

**1.3.2**  2009-07-11

  - Improved AIS target depiction and collision detection alerts.
  - Hot keys and scroll mouse support.
  - Help File.
  - Various display speed and quality optimizations, especially for CM93 charts.

**1.3.4**  2009-10-01

  - Ship's position tracking function, with GPX export and import.
  - Enhanced icons and screen graphics, for improved visibility.
  - Import and export of Routes using GPX interface protocol.
  - Implement CM93 vector chart detail control slider.
  - Assorted usability and reliability improvements.

**1.3.6**  2010-01-07

  - Add basic GRIB file decoding and chart overlay display.
  - Improve and expand NMEA message type support.
  - Improved documentation.
  - Add modular international language support.
  - Assorted usability and reliability improvements.

**2.1.0**  2010-06-26

  - BSBv3 raster and S57 ENC chart support.
  - CM93 vector chart support.
  - IHO S52 compliant display of S57 vector charts.
  - Single-chart and Quilted display modes.
  - North-up and Course-up display modes.
  - Moving-map display mode.
  - Route navigation with ship tracking functions.
  - Waypoint navigation.
  - NMEA 0183 GPS interface at selectable baud rate.
  - gpsd library support.
  - Autopilot output support.
  - AIS input with full target tracking and collision alerting.
  - Anchor watch/alarm functions.
  - GRIB file input and display for weather forecasting.
  - GPX Waypoint and Route input and output file support.
  - Tide and Current prediction and display by location.
  - Multi-language support.
  - linux and Windows compatible.

**2.3.0 **2010-12-18

  - Integrated PlugIn architecture, allowing third-party development and deployment of auxiliary features.
  - Two useful PlugIns available immediately
  - Graphical overlay of GRIB (weather)file data
  - Dashboard for configurable on-screen display of ship's NMEA data.
  - Enhanced Route, Track, and Waypoint management functions by selectable dialog.
  - Many new languages added to basic package, including Portuguese, Estonian, Greek, Turkish, Finnish, Norwegian, etc.
  - Support Garmin Host mode Route and Waypoint interchange and upload to remote GPS receivers.
  - Advanced internationalized Windows Program Installer.
  - Full support for North-up and Course-Up display of all chart types.
  - Expanded AIS target message decoding to include European Inland AIS specifications.
  - AIS Target List Dialog, allowing easy selection and monitoring of all active AIS targets.
  - Many, many improvements in the basic User Interface, while maintaining the ease-of-use that.

**2.3.1**  2010-12-31

  - Correct logic regarding ownship AIS messages (AIVDO)
  - Correct fault closing AIStarget list with target query dialog open (FS#310)
  - Correct occasional geolocation problem with routes on BSB chart switch.
  - Improve Toolbar refresh logic.
  - Increase maximum chart stack size from 20 to 30. (FS#316)
  - Correct GoTo waypoint and subsequent route delete logic. (FS#244)
  - Various language file updates.
  - Correct Depth unit display for quilted charts, with non-english language setting.
  - Correct Win7 Garmin USB Device interface reset in User Mode.
  - Correct Windows vc redistributable installation command in NSIS script.

**2.5.0**  2011-07-26

  - Per-Cell offset adjustment for cm93 charts
  - Transverse Mercator chart quilting.
  - Selectable full screen quilting option.
  - Configurable lat/lon gid lines.
  - Variable screen dimmer function.
  - Improved Tide/Current information window.
  - Configurable "Layers" function, enabling selectable display of fixed objects.
  - Improved and extended AIS functions, including Euro Inland support & Base Stations and ATONs
  - Selectable FullScreen display mode.
  - Integrated Route Planner function, with Tide table support.
  - Enhanced GUI functions, with floating transparent Toolbar.
  - Several new language options.
  - Improved internal memory management.
  - Improved Autopilot output support.
  - New Multi-leg Measurement tool.
  - Improved Vector chart symbology.
  - Improved integrated Tide/Current data accuracy.
  - Improved Route definition interface, including selectable Route colors.
  - Full conformance for all platforms, especially including Macintosh OS X.
  - Greatly improved staility on all platforms, as a result of extended Beta testing.
  - Many, many improvements in the basic User Interface, while maintaining the ease-of-use that OpenCPN is widely known for.

**3.0.0**  2012-06-05

  - New and Enhanced Features for OpenCPN Version 3.0
  - OpenGL support, for enhanced graphics performance and functionality.
  - Improved ENC object Query interface
  - Portable execution option, allowing easy migration to new systems.
  - Upgrade to wxWidgets 2.8.12.
  - Support ENC Overlay cells.
  - Upgrade gpsd support to Version 2.96
  - Implement enhanced PlugIn system, enabling a wide variety of PlugIn types.
  - Implement DSC and GPS_Gate Buddy tracking.
  - Implement user defined Chart Groups.
  - Implement AIS SART transponder display and tracking.
  - Improved ENC object rendering and display.
  - Implement user definable Tide/Current datasets.
  - Full conformance for all platforms, especially including Macintosh OS X.
  - Greatly improved stability on all platforms, as a result of extended Beta testing.
  - Many, many improvements in the basic User Interface, while maintaining the ease-of-use that OpenCPN is widely known for.

**3.0.2**  2012-07-07 This Service Release corrects several small bugs found in the recent 3.0.0 field release. It incorporates no new features.

**3.2.0**  2013-02-27

  - Complete update of user Options dialogs and context menus, incorporating modern graphics and uniform styles.
  - Significantly enhanced navigation instrument input and output options, including extensive network connection capabilities supporting TCP, UDP, and GPSD data sources.
  - New User Interface theme support, with OpenCPN traditional as well as two new low profile themes.
  - Enhanced clipboard support, including interfaces to external KML data sources.
  - Enhanced Tide and Current dataset support, including modern fully binary datasets.
  - Various improvements in the display and tracking of [[http://www.cruisersforum.com/forums/tags/ais.html|AIS]] data targets.
  - Automatic Great Circle route generation options.
  - Significant enhancement of the Dashboard PlugIn, including new user interface options and a variety of stylish, new instruments.
  - Improved sound system support for linux hosts.
  - Major update to embedded Users Manual.
  - Measurably improved performance and reliability over all supported platforms.

**3.2.2**  2013-05-08 This Service Release corrects several small bugs found in the recent 3.2.0 field release. It incorporates a command line switch to turn off OpenGL completely.

**4.0.0**  2015-01-08

  - A major release.
  - Increased performance in all modes, particularly when using OpenGL graphics acceleration.
  - Additional network interface methods, including TCP/IP client/server and UDP broadcast.
  - Support for multiple data source instances,
  - including Filtering and prioritization of messages
  - Output of NMEA data streams for real-time integration into ship systems
  - Improved support for Mac OS X systems, including 64 bit native support.
  - Integrated Tablet/Touch screen support.
  - AIS Personal Locater Beacon (PLB) configuration and tracking.
  - Enhanced AIS target tracking modes.
  - GRIB PlugIn feature additions.
  - Graphical GRIB email request generation.
  - Moving particle wind overlay.
  - Enhanced GRIB data type support.
  - Dashboard PlugIn feature additions.
  - More selectable instruments.
  - Several new and updated Plug-ins, including
  - Digital Radar overlay for popular radar scanners
  - World Magnetic Model variation compensator
  - Climatology analysis
  - Dynamic route planning
  - Integrated logbook
  - Realtime datastream capture, record and playback
  - Google Earth integration
  - Weatherfax overlay
  - Vector chart object and feature search tool
  - S63 Encrypted vector chart support
  - Major update to embedded Users Manual.
  - Measurably improved performance and reliability over all supported platforms.
  - And much more.

**4.2.0 **2016-02-03

  - Increased performance in all modes, particularly when using OpenGL graphics acceleration.
  - Integrated Chart Downloader PlugIn, allowing systematic tracking and donwload of latest online charts from several popular sources.
  - Integrated World Magnetic Model (WMM) PlugIn, providing accuratley calculated magnetic variation worldwide.
  - Major update to embedded Users Manual.
  - Measurably improved performance and reliability over all supported platforms.

**4.4.0 **2016-06-13

  - Support for GRIB V2 format files.
  - Measurably improved performance and reliability over all supported platforms.

**5.0.0 **2019-03-23 Release

  - [[https://opencpn.org/OpenCPN/about/ver500.html|5.0.0 Release Summary]]

**5.2.0 **2020-07-15 Release

  - [[https://opencpn.org/OpenCPN/about/ver520.html|5.2.0 Release Summary]]

**5.2.6 **2022-04-22 Maintenance Release

  - Numerous improvements to performance, usability, and reliability

